Machine for forming automobile tire-treads.



W. H. GROOK.

MACHINE FOR FORMING AUTOMOBILE TIRE TREADS.

APPLIOATIOH FILED OCT. 3, 1910.

Patented Jan. 17, 1911.

2 SHEETS-SHEET 2.

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' To ell whom it may concern:

I w rilieia a sig- Be it known that LWILLIAM H. Cnooir a citizen of the United States,'residi'ng at Anson'ia, in the county of New Haven and State of Connecticut, have invented a new and useful. Improvement in Machines for Forming Automobile Tire-Treads; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to

. be' a full, clear, and exact description of the same, and which said drawings constitute part of this specification,- and represent, iii- Figure 1 a side view partially in section of a machine for forming vehicle tire treads constructed in accordance with my invention. Fig. 2 an edge v ew of'the housing and drum with the adjustihgiscrews removed. F1g.'- 3

an' enlarged sectional View of the periphery of "the drum showing sections of rubber thereon. Fig. 4 a face View of the finishing rolls. Fig. 5 a section of-a drum with a flatface.

1 This invention relates to an improvement in machines for forming automobile tire treads. The tread or last covering of auto- 'mobile tires is made up from various layers of rubber or layers of rubber and fabric. In

' are cut in strips of different wi ths, then cut the usual construction of these treads the strips of rubber from which the are formed to proper length and built up by hand; that i is, one layer placed upon another and rolled onto it, then athird stri upon that, and so on until the proper thickness is obtained. This is an expensive method and difliculty is experienced because air bubbles will form between the strips."

The object of this invention is to provide an automatic device by which the strips may be taken from rolls and united over the surface of a drum so that strips of great length ,of rubber will not adhere.

are formed; and the invention consists in the constructlon hereinafter described and particularly recited in the claims.

and 5 will be wound together with a strip of sheeting 6. These strips are narrow strips, 3

. being thenarrowest, 4 the next in width,

and 5 stillwider. Upon the roll 7 two strips 8 and 9 willbe wound with a strip of sheeting 10, and upon the roll 11 strips 12 and 13' will be wound with a strip of sheeting 14. Adjacent to these rolls I mount a drum 15 upon an axle 16, and adjacent'to the periphery of this drum is a segmental housing 1-7 carrying a series of guide-rolls 18, 19, 2'0, 21-,

22, 23 and 24, and corresponding in number to the number of strips, in advance of each guide-roll is a pressure roll 25, 26, 27, 28, 29 or 30. These rolls are mounted in boxes 31 sliding in slots 32 and are forced against the edge of the drum 15 bysprings 33 which may be adjusted by screws 34. The face of the drum is formed as shown in Fig. 3, with a groove 35 having a series of steps 36, 37, 38, 39, 40 and 41' corresponding in width to the width of the several strips to be. wound; or the face of the drum may be plain instead of stepped as shown in Fig. 5. The said guiderolls may be set at a suitable angle to insure the right delivery of the strip guided by it upon the strip already upon the drum. Ad

I Specification of Letters Pateiit. Patented Jan, 1'7, 1911 Application filed October 3, 1910. Serial No. 585,108. 1

acent to the stock-rolls 2, 7. and 11 are guide-rolls 42, 43 and 44, to guide or direct' the strips from the stock-rolls to the drum by suitable mechanism, not shown, and the several strips of fabric will be delivered to the drum on which one is pressed against the other. Thus the strip 3 passing under the guide roll 18 enters the groove 35, and the strip 4 passing under the guide-roll 19 upon the steps 36 and is forced into contact with the strip 3 by the pressure roll 25; and owing to the angle at which the strip 4 passes into engagement with the strip 3 there is no danger of bubbles forming as the pressure roll will prevent it. The strip 5' passing under the guide roll 20 enters the groove upon the steps 37 and is pressed onto the face of the strip 4 by the pressure roll 26, and so on, each successive strip being wider than the preceding one, and is pressed into engagement with it. The completed strip is delivered from the drum to any convenient roll or table. This fabric as it comes from the drum will be stepped, as it might be said, on opposite sides and so as to give it a rounded surface the completed strip as iniounted in said housing, and spring-ae- 5 it passes over the drum 15' may pass between I tuated pressure rolls whereby strips passing finishing rolls 48 and 49.

As before stated, in some forms of treads around the guide-rolls will be imposed by strips of fabric are introduced and this may pressureone upon another. 5 be readily done by substituting-fabric for ft. A machine for forming the treads for any one of the strips of rubber. Thus, for automobile tires comprisinga drum having 40 instance, the strip 9 might be fabric instead a stepped groove in its face, a segmental of rubber so as to interposc a strip of fabric housing adjacent to the drum, guide-rolls in the center of the tread. mounted in said housing, pressure rolls ad 10 It .is apparent without illustration that in jacent to said guide-rolls, stock rolls mountstead ofwinding the strips from the rollers ed adjacent to the housing and each'adapted t5 2, 7 and 11, that these strips might be taken to carry a series of strips. and feed rolls bedirectly from the calender rolls of a rubber tween the said stock 'rolls and .a housing working machine. for directing the strips thereto.

o 15 I cla1m: 5. A machine for forming the treads for 1. A machine for forming the treads for automobile tires comprising a drum having so automobile tires comprising a drum having a stepped groove in its face, a segmental a groove in its face, a housing adjacent to housing. adjacent to the drum, guide-rolls 1 the drum, guide rolls mounted in. said housmounted in said housing, pressure rolls jad- 20 ing, and pressure rolls adjacent to said guide jacent to said guide-rolls, stock rolls mount-' rolls, whereby strips passing around i the cd adjacent to the housing and each adapted 53 guide rolls will be pressed one upon another. to carry a series of strips, feed rolls between 2. A machine for forming the treads for the said stock rolls and housingfor direct- V automobile tires comprising a drum having ing the strips thereto, and idlers and rollers 5 a stepped groove in its face, a segmental for conducting strips of sheeting from the housing ad acent to the drum, guide rolls stock rolls to a sheet-receiving roll. e1; mounted. in said housing, and pressure rolls In testimony whereof, I have signed this adjacent to said guide-rolls, whereby strips specification in the presence oftwo subscrib- O passing around the hguide-rolls will be ing Witnesses. I p 7 ressed one u on anot er. P 3. A machil re for forming the treads for VILLIAM CR automobile tires comprising a drum having. Witnesses: a stepped groove in its face, a segmental. M. E. DERMoDY,

housing ad acent to the drum, guide-rolls H. F. NANNING, 

